mirror of
https://github.com/carbon-language/carbon-lang.git
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Richard Smith
bc395eb889
When an `IntLiteral` appears as an operand of an `if` expression, convert it to `i32` for now, so that we don't reject things like `if cond then 1 else 2` due to having a non-constant value of type `IntLiteral`. For tuple indexing expressions such as `(a, b).0`, convert the index to type `IntLiteral`, not to type `i32`. This isn't strictly necessary to do in this PR, but avoids the need to provide an `IntLiteral` -> `i32` implicit conversion for `no_prelude` tests using this syntax.
67 lines
3.9 KiB
Plaintext
67 lines
3.9 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// AUTOUPDATE
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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lower/testdata/if_expr/empty_block.carbon
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// TIP: To dump output, run:
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// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lower/testdata/if_expr/empty_block.carbon
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fn Select(b: bool, c: bool, d: bool) -> i32 {
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return if b then if c then 1 as i32 else 2 else if d then 3 as i32 else 4;
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}
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// CHECK:STDOUT: ; ModuleID = 'empty_block.carbon'
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// CHECK:STDOUT: source_filename = "empty_block.carbon"
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// CHECK:STDOUT:
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// CHECK:STDOUT: define i32 @_CSelect.Main(i1 %b, i1 %c, i1 %d) !dbg !4 {
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// CHECK:STDOUT: entry:
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// CHECK:STDOUT: br i1 %b, label %if.expr.then.loc12_10, label %if.expr.else.loc12_10, !dbg !7
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// CHECK:STDOUT:
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// CHECK:STDOUT: if.expr.then.loc12_10: ; preds = %entry
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// CHECK:STDOUT: br i1 %c, label %if.expr.then.loc12_20, label %if.expr.else.loc12_20, !dbg !8
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// CHECK:STDOUT:
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// CHECK:STDOUT: if.expr.then.loc12_20: ; preds = %if.expr.then.loc12_10
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// CHECK:STDOUT: br label %if.expr.result.loc12_20, !dbg !8
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// CHECK:STDOUT:
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// CHECK:STDOUT: if.expr.else.loc12_20: ; preds = %if.expr.then.loc12_10
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// CHECK:STDOUT: br label %if.expr.result.loc12_20, !dbg !8
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// CHECK:STDOUT:
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// CHECK:STDOUT: if.expr.result.loc12_20: ; preds = %if.expr.else.loc12_20, %if.expr.then.loc12_20
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// CHECK:STDOUT: %0 = phi i32 [ 1, %if.expr.then.loc12_20 ], [ 2, %if.expr.else.loc12_20 ]
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// CHECK:STDOUT: br label %if.expr.result.loc12_10, !dbg !7
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// CHECK:STDOUT:
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// CHECK:STDOUT: if.expr.else.loc12_10: ; preds = %entry
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// CHECK:STDOUT: br i1 %d, label %if.expr.then.loc12_51, label %if.expr.else.loc12_51, !dbg !9
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// CHECK:STDOUT:
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// CHECK:STDOUT: if.expr.then.loc12_51: ; preds = %if.expr.else.loc12_10
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// CHECK:STDOUT: br label %if.expr.result.loc12_51, !dbg !9
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// CHECK:STDOUT:
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// CHECK:STDOUT: if.expr.else.loc12_51: ; preds = %if.expr.else.loc12_10
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// CHECK:STDOUT: br label %if.expr.result.loc12_51, !dbg !9
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// CHECK:STDOUT:
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// CHECK:STDOUT: if.expr.result.loc12_51: ; preds = %if.expr.else.loc12_51, %if.expr.then.loc12_51
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// CHECK:STDOUT: %1 = phi i32 [ 3, %if.expr.then.loc12_51 ], [ 4, %if.expr.else.loc12_51 ]
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// CHECK:STDOUT: br label %if.expr.result.loc12_10, !dbg !7
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// CHECK:STDOUT:
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// CHECK:STDOUT: if.expr.result.loc12_10: ; preds = %if.expr.result.loc12_51, %if.expr.result.loc12_20
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// CHECK:STDOUT: %2 = phi i32 [ %0, %if.expr.result.loc12_20 ], [ %1, %if.expr.result.loc12_51 ]
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// CHECK:STDOUT: ret i32 %2, !dbg !10
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: !llvm.module.flags = !{!0, !1}
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// CHECK:STDOUT: !llvm.dbg.cu = !{!2}
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// CHECK:STDOUT:
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// CHECK:STDOUT: !0 = !{i32 7, !"Dwarf Version", i32 5}
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// CHECK:STDOUT: !1 = !{i32 2, !"Debug Info Version", i32 3}
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// CHECK:STDOUT: !2 = distinct !DICompileUnit(language: DW_LANG_C, file: !3, producer: "carbon", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
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// CHECK:STDOUT: !3 = !DIFile(filename: "empty_block.carbon", directory: "")
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// CHECK:STDOUT: !4 = distinct !DISubprogram(name: "Select", linkageName: "_CSelect.Main", scope: null, file: !3, line: 11, type: !5, spFlags: DISPFlagDefinition, unit: !2)
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// CHECK:STDOUT: !5 = !DISubroutineType(types: !6)
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// CHECK:STDOUT: !6 = !{}
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// CHECK:STDOUT: !7 = !DILocation(line: 12, column: 10, scope: !4)
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// CHECK:STDOUT: !8 = !DILocation(line: 12, column: 20, scope: !4)
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// CHECK:STDOUT: !9 = !DILocation(line: 12, column: 51, scope: !4)
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// CHECK:STDOUT: !10 = !DILocation(line: 12, column: 3, scope: !4)
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