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mewmew / uc

A compiler for the µC language.

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irgen: "invalid getelementptr indices"

mewmew opened this issue · comments

commented

Dereference nested pointers with load instructions before using getelementptr to access retrieve pointers to elements.

This feature affects the following test cases.

  • testdata/extra/irgen/array_param.c
  • testdata/noisy/advanced/8queens.c
  • testdata/noisy/simple/sim11.c
  • testdata/quiet/semantic/s04.c
  • testdata/quiet/semantic/s03.c
  • testdata/quiet/semantic/s02.c
  • testdata/quiet/mips/m01.c
  • testdata/quiet/rtl/r05.c

Invalid getelementptr indices

testdata/extra/irgen/array_param.c

u@x1 ~/D/g/s/g/m/uc> ./compile.sh testdata/extra/irgen/array_param.c
Compiling "testdata/extra/irgen/array_param.c"
llvm-link: a.ll:5:27: error: invalid getelementptr indices
        %2 = getelementptr i32*, i32** %1, i64 0, i64 3
                                 ^

testdata/noisy/advanced/8queens.c

Compiling "testdata/noisy/advanced/8queens.c"
llvm-link: a.ll:19:27: error: invalid getelementptr indices
        %9 = getelementptr i32*, i32** %1, i64 0, i64 %8
                                 ^

testdata/noisy/simple/sim11.c

Compiling "testdata/noisy/simple/sim11.c"
llvm-link: a.ll:10:26: error: invalid getelementptr indices
        %4 = getelementptr i8*, i8** %2, i64 0, i64 0
                                ^

testdata/quiet/semantic/s04.c

Compiling "testdata/quiet/semantic/s04.c"
llvm-link: a.ll:5:26: error: invalid getelementptr indices
        %2 = getelementptr i8*, i8** %1, i64 0, i64 0
                                ^

testdata/quiet/semantic/s03.c

Compiling "testdata/quiet/semantic/s03.c"
llvm-link: a.ll:6:27: error: invalid getelementptr indices
        %2 = getelementptr i32*, i32** %1, i64 0, i64 0
                                 ^

testdata/quiet/semantic/s02.c

Compiling "testdata/quiet/semantic/s02.c"
2016/06/19 00:56:06 (testdata/quiet/semantic/s02.c:3) error: missing return at end of non-void function "foo"
  ; }
    ^

testdata/quiet/mips/m01.c

Compiling "testdata/quiet/mips/m01.c"
2016/06/19 00:56:06 (testdata/quiet/mips/m01.c:13) error: missing return at end of non-void function "mov"
}
^

testdata/quiet/rtl/r05.c

Compiling "testdata/quiet/rtl/r05.c"
llvm-link: a.ll:6:27: error: invalid getelementptr indices
        %2 = getelementptr i32*, i32** %1, i64 0, i64 5
                                 ^
commented

Hopefully fixed in commit 66b23f7 :) Re-open this issue if any further relevant issues are identified.

commented

Re-open the issue as it was closed prematurely. The following test case is still failing.

    irgen_test.go:321: "../testdata/extra/irgen/issue_73_pointer_pointer_ref.c": module mismatch; expected `define void @f(i32* %x) {
        ; <label>:0
            %1 = alloca i32*
            store i32* %x, i32** %1
            %2 = load i32*, i32** %1
            ret void
        }
        `, got `define void @f(i32* %x) {
        ; <label>:0
            %1 = alloca i32*
            store i32* %x, i32** %1
            ret void
        }
        `
commented

Fixed as of commit 862aae2.